<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
				var a=[['小红','女','21','大一'],['小黄','男','23','大二'],['小蓝','男','23','大三'],['大红','女','25','大一']];
						for(i=0;i<a.length;i++){
							if(a[i][3]=="大一"){
								document.write(a[i][0]);
								}
							
						}
		</script>
	</body>
</html>
